"I give you the biggest white shark ever seen in front of the cages in Guadalupe Island... DEEP BLUE!!!" he wrote.

In the film, the shark is seen approaching the boat before a diver leaves the cage to high five her fin. She then circles the cage before swimming off into the deep.

While Deep Blue is indeed massive, she is not the biggest great white ever seen.

A 6.4m great white was caught off the Gulf of Mexico in 1945 by six fishermen during their daily hunt.

In 2013, a great white estimated to have measured more than 7m also attacked a woman off Maui – from the bites, the doctor said the shark must have measured around 25ft, but this could not be verified.